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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QDN42PKI6C3I5LSP2LD37KUXEK66BAAQ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "QDN42PKI6C3I5LSP2LD37KUXEK66BAAQ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IOQFJ4BG6Y543E2US4BOCZCEM5BMOXP4/?format=api",
    "sender": {
        "address": "JamesDuffey (a) comcast.net",
        "mailman_id": "16d2718d7d4a47dca8f564d867aacfe2",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/16d2718d7d4a47dca8f564d867aacfe2/emails/?format=api"
    },
    "sender_name": "James Duffey",
    "subject": "[amsat-bb] Re: Question re WA5VJB \"Cheap Yagiis\"",
    "date": "2008-11-15T02:58:32Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/42AJZSR4RORL67B23XPJEQSHX3XTZ7G5/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Well Curt, I have the 10 element 432 version up and running FB. I\ndon't have a 432 MHz analyzer, but these antennas are pretty much\nbuild and play. I wouldn't worry about tweaking them too much. - Duffey\nOn Nov 14, 2008, at 7:51 PM, Curt Nixon wrote:\n\n> Thanks James.\n>\n> Yes that is the way I layed them out--using a long rule.  I'm an old  \n> gage designer so understand cumulative error stackup.\n>\n> Those are the same differences I have, but when the chart is used  \n> for the next two elements for a ten element unit, the spacings just  \n> look odd.\n>\n> I'm going to build it as specified.  It is that way on several pages  \n> so probably OK.\n>\n>\n>\n> Now I just thave to get a 300.00 antenna analyzer to figure out if  \n> the match is good on the $10.00 antenna!! ;)\n>\n> Curt\n>\n>\n> James Duffey wrote:\n>> Curt - I have built lots of there. I use the 1/2 inch as the inside  \n>> dimension.\n>>\n>> It is best to measure the spacing as cumulative from the rear, not  \n>> incremental. That eliminates cumulative errors. ANd you don't have  \n>> to subtract. Use a tape measure, or you can buy a 5 or 6 ft steel  \n>> rule pretty cheaply at Lowes or HOme Depot.\n>>\n>> Here is the referencce I use for LEO antennas:\n>>\n>> < http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf >\n>>\n>> Here is what I get for the spacings when I subtract: 5.75, 6.25,  \n>> 6.5, 6.5, 7.25. I think that this is reasonable.\n>>\n>> But don't subtract measure it all from a single reference point,  \n>> the reflector. The antennas work great. - Duffey\n>> On Nov 14, 2008, at 11:47 AM, Curt Nixon wrote:\n>>\n>>> Good afternoon:\n>>>\n>>> Hi have liked the way the WA5VJB Kent Britain 144Mhz cheap yagi  \n>>> worked\n>>> so decided to build one for 435.\n>>>\n>>> Couple of questions:\n>>>\n>>> For the driven element \"hairpin\" or J, it shows 1/2\" dimension for  \n>>> the\n>>> spacing--knowing this might be critical on 435, is that INSIDE  \n>>> spacing\n>>> or OUTSIDE spacing??\n>>>\n>>> Also, I noticed what appears to be unusual element spacing for the  \n>>> last\n>>> directors in both the 435 and 432 versions.  The spacing  \n>>> increments seem\n>>> to follow an increasing spacing trend but then the last couple are\n>>> different.  ie  spacing goes ...6.25, 6.5, 6.5, 7.25, 7.25, 7.0,  \n>>> then 7.5.\n>>>\n>>> Is this a result of the computer design for easily progressive  \n>>> build, or\n>>> perhaps some error in the dimensions posted on-line??\n>>>\n>>> Thanks,\n>>>\n>>> Curt\n>>>\n>>> KU8L\n>>>\n>>>\n>>> _______________________________________________\n>>> Sent via [email protected]. Opinions expressed are those of the  \n>>> author.\n>>> Not an AMSAT-NA member? Join now to support the amateur satellite  \n>>> program!\n>>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>>\n>> -- \n>> KK6MC\n>> James Duffey\n>> Cedar Crest NM\n>>\n>>\n>>\n>>\n>>\n>>\n>\n\n--\nKK6MC\nJames Duffey\nCedar Crest NM\n\n\n\n\n\n",
    "attachments": []
}